WO2022047839A1

WO2022047839A1 - Multi-point touch recognition method, apparatus and device for infrared touch screen

Info

Publication number: WO2022047839A1
Application number: PCT/CN2020/116194
Authority: WO
Inventors: 宫姜男; 赖迈健
Original assignee: 安徽鸿程光电有限公司
Priority date: 2020-09-02
Filing date: 2020-09-18
Publication date: 2022-03-10
Also published as: CN112214135A; CN112214135B

Abstract

A multi-point touch recognition method for an infrared touch screen, comprising: generating an infrared image according to acquired infrared information (S101); traversing pixel values of points in the infrared image to obtain wave crest regions of the infrared image (S102); and determining a target touch region according to the wave crest regions and a preset screening rule (S103). The number of suspected touch regions obtained by the method is greatly reduced, the workload of subsequently screening the target touch region from the suspected touch regions is also reduced, the speed of recognition can be increased, and the situation of wrong screening or missing screening due to excessive workload can be avoided. The target touch region can be screened more accurately, and the recognition precision and recognition speed during multi-point touch are improved.

Description

A kind of infrared touch screen multi-touch recognition method, device and equipment

This application claims the priority of the Chinese patent application with the application number 202010911951.X and the invention title "An infrared touch screen multi-touch recognition method, device and equipment" filed in the China Patent Office on September 2, 2020, The entire contents of which are incorporated herein by reference.

technical field

The present application belongs to the field of computer technology, and in particular relates to a multi-touch recognition method, device and device for an infrared touch screen.

Background technique

Infrared technology touch screen Touch Screen Technology, referred to as infrared touch screen) is composed of infrared emitting and receiving sensing elements mounted on the outer frame of the touch screen, and the two-way infrared emitting tube and infrared receiving tube together form a positioning plane. In application, in order to detect the user's touch point on the infrared touch screen, the infrared touch screen device will scan in turn whether there are infrared signals blocked between all the corresponding infrared transmitting tubes and infrared receiving tubes in the horizontal and vertical directions. The position coordinates of the touch area are determined by calculating the position where the infrared signal is blocked.

However, the above-mentioned methods for detecting touch points are generally limited to single-point touches. When the user performs multiple touches, a large number of suspected touch areas may be detected, and the real touch areas screened out from a large number of suspected touch areas may also have large error, resulting in the inability to accurately locate the real touch area.

technical problem

The embodiments of the present application provide a multi-touch recognition method, device and device for an infrared touch screen, which can solve the problem that the real touch area cannot be accurately located in the prior art.

technical solutions

In a first aspect, an embodiment of the present application provides a multi-touch recognition method for an infrared touch screen, including:

Generate an infrared image according to the collected infrared information;

Traverse the pixel values of each point in the infrared image to obtain the peak area of the infrared image;

The target touch area is determined according to the peak area and the preset filtering rule.

Further, traversing the pixel values of each point in the infrared image to obtain the peak area of the infrared image, including:

Traverse the pixel values of the pixel points of each row in the horizontal direction in the infrared image, obtain a first pixel value curve of the pixel values of the pixel points of each row, and obtain the first peak area according to the first pixel value curve;

Traverse the pixel values of the pixel points of each column in the vertical direction in the infrared image, obtain a second pixel value curve of the pixel values of the pixel points in each column, and obtain a second peak area according to the second pixel value curve;

Based on the first peak region and the second peak region, a peak region of the infrared image is determined.

Further, by traversing the pixel values of the pixel points of each row in the horizontal direction in the infrared image, a first pixel value curve of the pixel values of the pixel points of each row is obtained, and the first pixel value curve is obtained according to the first pixel value curve. Crest area, including:

Traverse the pixel values of the pixel points of each row in the horizontal direction in the infrared image to obtain a first pixel value curve of the pixel values of the pixel points of each row, and the peak points in the first pixel value curve;

According to the peak point of each first pixel value curve and the preset peak height, the first peak area corresponding to each first pixel value curve is determined.

Traversing the pixel values of the pixel points of each column in the vertical direction in the infrared image to obtain a second pixel value curve of the pixel values of the pixel points in each column, and the peak points in the second pixel value curve;

According to the peak point of each second pixel value curve and the preset peak height, the second peak area corresponding to each second pixel value curve is determined.

Further, generating an infrared image according to the collected infrared information includes:

Obtain the signal value collected by each infrared receiving tube;

An infrared image is generated based on the signal values.

Further, the generating an infrared image according to the signal value includes:

generating an initial image based on the signal values;

The pixel value of the pixel whose pixel value is less than the preset pixel threshold in the initial image is set to 0 to obtain an infrared image.

Further, determining the target touch area according to the peak area and the preset screening rule includes:

Obtain the connected area of the pixel points corresponding to the peak area, and determine the suspected touch area according to the connected area;

Obtaining feature information of the suspected touch area, and determining authenticity evaluation information of the suspected touch area based on the feature information;

Screening out a target touch area from the suspected touch area according to the authenticity evaluation information;

Determine the location information of the target touch area.

In a second aspect, an embodiment of the present application provides an infrared touch screen multi-touch recognition device, including:

a first generating unit, configured to generate an infrared image according to the collected infrared information;

a first processing unit, configured to traverse the pixel values of each point in the infrared image to obtain the peak area of the infrared image;

The first determining unit is configured to determine the target touch area according to the peak area and the preset screening rule.

Further, the first processing unit includes:

The second processing unit is configured to traverse the pixel values of the pixel points of each row in the horizontal direction in the infrared image to obtain a first pixel value curve of the pixel values of the pixel points of each row, and obtain the first pixel value curve according to the first pixel value curve. The first wave peak area;

A third processing unit, configured to traverse the pixel values of the pixel points in each column in the vertical direction in the infrared image, and obtain a second pixel value curve of the pixel values of the pixel points in each column, according to the second pixel value curve Get the second wave peak area;

A second determining unit, configured to determine a wave peak area of the infrared image based on the first wave peak area and the second wave peak area.

Further, the second processing unit is specifically used for:

Further, the third processing unit is specifically used for:

Further, the first generating unit includes:

a first acquisition unit, used for acquiring the signal values collected by each infrared receiving tube;

The second generating unit is configured to generate an infrared image according to the signal value.

Further, the second generating unit is specifically used for:

generating an initial image based on the signal values;

Further, the first determining unit is specifically used for:

Determine the location information of the target touch area.

In a third aspect, an embodiment of the present application provides an infrared touch screen multi-touch recognition device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing The computer program implements the multi-touch recognition method for an infrared touch screen as described in the first aspect.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, implements the infrared touch screen according to the first aspect above Multi-touch recognition method.

beneficial effect

In the embodiment of the present application, an infrared image is generated according to the collected infrared information; the pixel values of each point in the infrared image are traversed to obtain the peak area of the infrared image; the target touch is determined according to the peak area and preset screening rules area. The peak area of the infrared image corresponds to the suspected touch area, and further screening is performed on the basis of the obtained suspected touch area, so the number of the obtained suspected touch area is less than that obtained in the prior art. The number of suspected touch areas is greatly reduced, and the subsequent workload of screening the target touch areas from the suspected touch areas will also be reduced, which can improve the speed of recognition, and can avoid wrong or missed screening due to excessive workload. The target touch area is screened more accurately, and the recognition accuracy and recognition speed of multi-touch are improved.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present application. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic flowchart of a multi-touch recognition method for an infrared touch screen provided by the first embodiment of the present application;

2 is a schematic diagram of an infrared path provided on an infrared touch screen provided by the first embodiment of the present application;

3 is a schematic diagram of a first pixel value curve of a pixel in an infrared image in a multi-touch recognition method for an infrared touch screen provided by the first embodiment of the present application;

4 is a schematic diagram of an infrared touch screen multi-touch recognition terminal provided by a second embodiment of the present application;

FIG. 5 is a schematic diagram of an infrared touch screen multi-touch recognition device provided by a third embodiment of the present application.

Embodiments of the present invention

In the following description, for the purpose of illustration rather than limitation, specific details such as a specific system structure and technology are set forth in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be practiced in other embodiments without these specific details.

The term "if" may be interpreted as "when" or "once" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if the [described condition or event] is detected" may be interpreted, depending on the context, to mean "once it is determined" or "in response to the determination" or "once the [described condition or event] is detected. ]" or "in response to detection of the [described condition or event]".

Please refer to FIG. 1. FIG. 1 is a schematic flowchart of a multi-touch recognition method for an infrared touch screen provided by the first embodiment of the present application. In this embodiment, the execution body of the method for multi-touch recognition on an infrared touch screen is a device with a multi-touch recognition function on an infrared touch screen. The multi-touch recognition method of the infrared touch screen as shown in FIG. 1 may include:

S101: Generate an infrared image according to the collected infrared information.

A plurality of groups of infrared transceiver modules are arranged in the infrared touch screen of the terminal device. Each group of infrared transceiver modules includes an infrared transmitting tube and an infrared receiving tube. The infrared transmitting tube and the infrared receiving tube are set separately.

In the infrared transceiver module, the infrared transmitting tube can emit infrared light, and the infrared receiving tube can receive infrared light, and convert the received infrared light signal into an electrical signal to obtain the signal value corresponding to the infrared light. Multiple groups of infrared transceiver modules can form an infrared detection network.

When the infrared emitting tube emits infrared, the infrared can be received by the corresponding infrared receiving tube. If the infrared rays are not blocked, the signal value of the infrared rays received by the infrared receiving tube should be a preset value.

If the infrared ray is blocked, the intensity of the infrared ray will drop sharply, so that the signal value of the infrared ray received by the infrared receiving tube is much smaller than the preset value.

Therefore, in the actual application process, the terminal device can judge whether the infrared rays corresponding to the infrared receiving tube are blocked according to the signal value of the infrared rays detected by the infrared receiving tube.

If the signal value of the infrared rays received by a certain infrared receiving tube is less than the preset threshold, it means that the infrared rays corresponding to the infrared receiving tube are blocked by an object.

If the signal value of the infrared rays received by a certain infrared receiving tube is greater than or equal to the preset threshold, it means that the infrared rays corresponding to the infrared receiving tube are not blocked by the object.

The above objects that block infrared rays may be fingers, styluses or other objects.

The preset threshold value may be determined according to the above preset value and the allowable error threshold value. For example, the preset threshold may be a difference obtained by subtracting the error threshold from the preset value. Alternatively, the above-mentioned preset threshold value may also be other values that are greater than the above-mentioned difference value and smaller than the above-mentioned predetermined value.

When the terminal device performs touch recognition, the terminal device can obtain the collected infrared information. The infrared information may be the signal value of infrared collected by each infrared receiving tube.

Afterwards, the terminal device can determine the blocked infrared rays according to the signal values of the infrared rays collected by the respective infrared receiving tubes.

After determining the blocked infrared rays, the terminal device may determine the starting position and the ending position of each blocked infrared rays according to the preset rectangular coordinate system.

The above-mentioned starting position is the position coordinate of the infrared emitting tube corresponding to the blocked infrared rays.

The above-mentioned end position is the position coordinate of the infrared receiving tube corresponding to the blocked infrared rays.

The terminal device can determine the pixel points through which the blocked infrared rays pass through according to the starting position, ending position and the width of the infrared rays.

Afterwards, the terminal device may generate an infrared image based on the pixels passing through each of the blocked infrared rays.

In an infrared image, if a pixel at a certain position is passed by a block of infrared rays, the pixel value of the pixel is accumulated by K. If the pixel is passed by N blocked infrared rays, the pixel value of the pixel is accumulated N times, and the pixel value of the pixel is N*K. K is a natural number greater than 0, and N is a positive integer greater than or equal to 0.

The terminal device can determine the pixel value of each pixel in the infrared image according to the number of blocked infrared rays passing through each pixel in the infrared image.

For example, as shown in FIG. 2 , FIG. 2 is a schematic diagram of an infrared path set on an infrared touch screen. The rectangular area in FIG. 2 is the area blocked by the blocking object, and the rectangular area blocks many infrared rays. At this time, the terminal device can determine the blocked infrared rays according to the signal values collected by each infrared receiving tube, and determine the pixel values of the pixel points through which the blocked infrared rays pass, thereby obtaining the infrared image in this embodiment.

It should be noted that the above infrared image may be a grayscale image. At this time, the pixel value of each pixel in the infrared image is the gray value of the pixel. Wherein, in this embodiment, the grayscale image may be an 8-bit grayscale image, that is, the image may have grayscale values of at most 256 levels, and the grayscale value may range from 0 to 255.

In the embodiment of the present application, the terminal device may generate an infrared image according to the collected infrared information. In an infrared image, the higher the pixel value of a pixel, the higher the possibility that the pixel belongs to the occluded area. Therefore, compared with the prior art, the terminal device of this embodiment can more intuitively and accurately reflect the possibility that each pixel belongs to the blocked area through the pixel value of each pixel in the infrared image.

In addition, since the touch point is usually passed by a plurality of infrared rays, the terminal device can use the currently generated infrared image as the initial image.

Then, the terminal device performs filtering processing on the initial image, uses the pixel points in the initial image whose pixel values are less than the preset pixel threshold as noise points, and sets the pixel value of the noise points to 0, thereby obtaining a filtered infrared image.

The preset pixel threshold can be set according to the actual scene. For example, the preset pixel threshold can be set to 5, 10, 20 and other values.

In an infrared image, the lower the pixel value of a pixel, the lower the possibility that the pixel belongs to the occluded area. Therefore, the terminal device filters the initial image by using the preset pixel threshold, which can filter out noise points in the initial image, reduce the amount of calculation for subsequent processing of the infrared image, and improve the accuracy of identifying the target touch area.

S102: Traverse the pixel values of each pixel in the infrared image to obtain a peak area of the infrared image.

After acquiring the infrared image, the terminal device may acquire the pixel value of each row of pixels in the infrared image and the pixel value of each column of pixels in the vertical direction in the infrared image.

Then, the terminal device can traverse the pixel values of the pixels of each row in the horizontal direction in the infrared image, and perform curve fitting according to the pixel values of the pixels of each row and the abscissa of each pixel to obtain the first pixel value corresponding to each row of pixels. A pixel curve.

After acquiring the above-mentioned first pixel curve, the terminal device may search for the peak point and the trough point in the first pixel curve.

In the first pixel curve, the pixel value of the peak point is greater than the pixel value of the pixel points on the adjacent sides thereof, and the pixel value of the trough point is smaller than the pixel value of the pixel points on the adjacent sides thereof.

After determining the peak point of the first pixel curve, the terminal device may determine the wave region corresponding to the peak point. The region from the peak point to the trough points on the adjacent two sides is the wave region of the peak point.

For example, as shown in FIG. 3 , A is the peak point in the first pixel curve, B and C are the trough points adjacent to point A in the first pixel curve, and each pixel point in the area from point B to point A The pixel value of , increases monotonically, and the pixel value of each pixel in the area from point A to point C decreases monotonically.

At this time, the terminal device may determine the area from point B to point C as the wave area of point A.

After determining the wave region corresponding to the peak point, the terminal device may intercept the first peak region in the wave region corresponding to the peak point according to the preset peak height. The difference between the pixel value of the peak point and the pixel value of each pixel point in the first peak area is less than or equal to the preset peak height.

For example, as shown in FIG. 3 , the area from point B to point C is determined as the wave area of point A of the crest point. The terminal device can intercept the area from point B to point C according to the preset peak height to obtain point D and point E.

The area from point D to point E is the peak area of point A, and the difference between the pixel value of point A and each pixel in the area from point D to point E is less than or equal to the preset peak height.

Similarly, the terminal device can traverse the pixel values of the pixels in each column in the vertical direction of the infrared image, perform curve fitting according to the pixel values of the pixels in each column and the ordinate of each pixel, and obtain the first corresponding to each column. Two-pixel curve.

Then, the terminal device determines the peak point and the trough point in the second pixel curve according to the second pixel curve.

In the second pixel curve, the pixel value of the peak point is greater than the pixel value of the pixel points on the adjacent sides thereof, and the pixel value of the trough point is smaller than the pixel value of the pixel points on the adjacent sides thereof.

After determining the peak point of the second pixel curve, the terminal device may determine the wave region corresponding to the peak point. The region from the peak point to the trough points on the adjacent two sides is the wave region of the peak point.

After determining the wave region corresponding to the peak point, the terminal device may intercept the second peak region in the wave region corresponding to the peak point according to the preset peak height.

The difference between the pixel value of the peak point and the pixel value of each pixel point in the second peak area is less than or equal to the preset peak height.

In the above manner, the terminal device can determine the first peak area corresponding to each first pixel curve according to the peak point of each first pixel curve and the preset peak height, and, according to the peak point of each second pixel curve and the preset peak height height, to determine the second peak area corresponding to each second pixel curve.

Then, the terminal device may determine the peak region of the infrared image based on the first peak region and the second peak region.

Specifically, if a certain pixel belongs to both the first peak region of a first pixel curve and the second peak region of a second pixel curve, the terminal device can determine the pixel as the peak of the infrared image point, and determine the position of the wave crest point of the infrared image as the wave crest area of the infrared image.

For example, assuming that a certain pixel belongs to the first peak area of the Xth row, and at the same time, the pixel also belongs to the second peak area of the Yth row, then the pixel point is the peak point of the infrared image, and the position of the pixel point belongs to The peak area of the infrared image. Both X and Y are positive integers greater than 0.

It can be understood that, in the infrared image, the higher the pixel value of the pixel point, the higher the possibility that the pixel point belongs to the occluded area. Therefore, the occluded area should be the peak area where the peak points in the infrared image are located.

To this end, in this embodiment, the terminal device traverses the pixel values of each pixel in the infrared image, so as to identify the peak area of the infrared image. At this time, the terminal device can limit the screening range of the target touch area to the identified peak area of the infrared image, thereby reducing the workload of screening the target touch area and improving the accuracy of identifying the target touch area.

In addition, when recognizing the wave crest area of the infrared image, the terminal device can identify the first wave crest area from the row direction and the second wave crest area from the column direction, respectively. Then, the terminal device integrates the first wave crest area and the second wave crest area to identify the wave crest area of the infrared image. By determining the wave crest area of the infrared image by the above-mentioned secondary identification method, the accuracy of identifying the wave crest area of the infrared image can be further improved.

S103: Determine a target touch area according to the peak area and a preset screening rule.

After acquiring the wave crest area of the infrared image, the terminal device may determine the target touch area from the above wave crest area according to a preset screening rule.

Preset filtering rules can be set according to actual needs.

In some possible implementation manners, the terminal device may acquire the number of pixel points contained in each peak area, and determine the peak area with the number of pixel points greater than the first number threshold as the target touch area.

When the user touches the infrared touch screen, the touched area should have a certain size. Moreover, in the infrared image, the area of each peak region is related to the number of pixels in the peak region. Therefore, when the terminal device identifies the target touch area, the first quantity threshold may be set.

If the number of pixels in a certain peak area is less than or equal to the first number threshold, it means that the area of the peak area is small, and the peak area is not the target touch area.

If the number of pixels in a certain wave peak area is greater than the first number threshold, the terminal device may determine the wave peak area as the target touch area.

At this time, the terminal device can quickly and accurately identify the target touch area from each wave peak area according to the number of pixels contained in each wave peak area, thereby improving the recognition speed and accuracy of identifying the target touch area.

In some other possible implementation manners, the terminal device may determine the connected area of the pixel points corresponding to the peak area, and determine it as the suspected touch area according to the above connected area.

The pixel points in each peak area are the peak points of the infrared image. At this time, the terminal device can determine the connected area of the pixel points corresponding to the peak area according to the coordinates of each peak point.

The connected area is an image area composed of adjacent wave crest points, that is, any two pixel points in the connected area can be connected by a line completely belonging to the connected area.

The terminal device can obtain the connected area of the pixel points corresponding to the peak area through any one of the algorithm based on the binary image segmentation method, the seed filling method, the watershed method and the region growing method. No restrictions.

After the connected area is determined, the terminal device can screen the connected area to obtain the suspected touch area. For example, the terminal device may acquire the number of pixels in each connected area, and determine the connected area with the number of pixel points greater than the second number threshold as the suspected touch area.

After the suspected touch area is determined, the terminal device may acquire characteristic information of the suspected touch area, and determine authenticity evaluation degree information of the suspected touch area based on the characteristic information.

The above feature information is used to identify features of the suspected touch area. The above feature information may include one or more of information such as the area of the suspected touch area, the amount of infrared rays passing through the suspected touch area, and the highest pixel value in the suspected touch area.

After acquiring the above-mentioned feature information, the terminal device may score the above-mentioned feature information according to a preset scoring standard, and obtain authenticity evaluation degree information corresponding to each suspected touch area.

When the feature information includes only one type of information, the authenticity evaluation degree information is the rating value of the information. When the feature information includes multiple kinds of information, the authenticity evaluation degree information is the sum of the score values corresponding to the respective pieces of information.

After determining the authenticity evaluation degree information of the suspected touch area, the terminal device can filter out the target touch area from the suspected touch area based on the authenticity evaluation degree information, and obtain the position information of the target touch area.

Specifically, the higher the authenticity evaluation degree information, the greater the possibility that the suspected touch area corresponding to the authenticity evaluation degree information is a real touch area.

Therefore, the terminal device may determine the suspected touch area corresponding to the authenticity evaluation degree information greater than the preset information threshold as the target touch area. Alternatively, the terminal device may also sort the authenticity evaluation information corresponding to each suspected touch area in descending order, and select the suspected touch area corresponding to the highest K authenticity evaluation information as the target touch area. K is a preset positive integer.

For example, when a user uses an infrared touch screen, he usually uses one finger for single touch, two fingers for double touch, and three fingers for three touch. Therefore, the above K can be set to 3 . When there are multiple suspected touch areas, the suspected touch areas corresponding to the highest three authenticity evaluation degree information may be selected as target touch areas.

In the above description, the terminal device sets preset scoring standards. Through the preset scoring standard, the terminal device can calculate the authenticity evaluation information of each suspected touch area according to the characteristic information of each suspected touch area, and quantify the reliability of each suspected touch area, so that the terminal device can The authenticity evaluation information can easily and quickly screen the target touch area, and improve the recognition speed and accuracy of identifying the target touch area.

To sum up, in the embodiment of the present application, the terminal device generates an infrared image according to the collected infrared information; traverses the pixel values of each point in the infrared image to obtain the peak area of the infrared image; Preset filtering rules determine the target touch area. In the prior art, the suspected touch area is simply determined by judging whether the infrared signal is blocked. Once the infrared signal is blocked, it is determined that there is currently a suspected touch area, so that a large number of suspected touch areas will be detected. Screening the last target touch area in the touch area has a huge workload, and the recognition speed during multi-touch is slow, and due to the large amount of data, there may be wrong or missed screening during screening, resulting in multi-touch recognition. Low precision. In the above scheme, although it also judges whether the infrared signal is blocked, when the infrared light is blocked, the above scheme does not directly determine the suspected touch area, but determines the infrared image according to the blocked infrared, and then obtains the corresponding infrared image. crest area. It can be understood that the infrared image in this embodiment may correspond to the suspected touch area in the prior art. In this embodiment, the peak area of the infrared image corresponds to the suspected touch area, that is to say, the above solution is based on the suspected touch area obtained in the prior art, and further screening is performed to obtain the suspected touch area. Therefore, the number of suspected touch areas obtained in the above solution is less than the number of suspected touch areas obtained in the prior art. In this way, since the number of suspected touch areas obtained by this embodiment is greatly reduced, the subsequent workload of screening target touch areas from the suspected touch areas will also be reduced, the recognition speed can be improved, and errors due to excessive workload can be avoided. In the case of screening or missing screening, the target touch area can be screened more accurately, which improves the recognition accuracy and recognition speed during multi-touch.

It should be understood that the size of the sequence numbers of the steps in the above embodiments does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Please refer to FIG. 4 . FIG. 4 is a schematic diagram of a multi-touch recognition terminal on an infrared touch screen provided by a second embodiment of the present application. For convenience of explanation, only the parts related to this embodiment are shown. Referring to Figure 4, the infrared touch screen multi-touch identification terminal includes:

a first generating unit 410, configured to generate an infrared image according to the collected infrared information;

a first processing unit 420, configured to traverse the pixel values of each point in the infrared image to obtain the peak area of the infrared image;

The first determining unit 430 is configured to determine the target touch area according to the peak area and the preset screening rule.

Further, the first processing unit 420 includes:

Further, the second processing unit is specifically used for:

Further, the third processing unit is specifically used for:

Further, the first generating unit 410 includes:

Further, the second generating unit is specifically used for:

generating an initial image based on the signal values;

Further, the first determining unit 430 is specifically configured to:

Determine the location information of the target touch area.

FIG. 5 is a schematic diagram of an infrared touch screen multi-touch recognition device provided by a third embodiment of the present application. As shown in FIG. 5 , the infrared touch screen multi-touch recognition device 5 of this embodiment includes: a processor 50 , a memory 51 , and a computer program 52 stored in the memory 51 and executable on the processor 50 , for example Infrared touch screen multi-touch recognition program. When the processor 50 executes the computer program 52 , the steps in each of the above-mentioned embodiments of the infrared touch screen multi-touch recognition method are implemented, for example, steps 101 to 103 shown in FIG. 1 . Alternatively, when the processor 50 executes the computer program 52, the functions of the modules/units in the above-mentioned apparatus embodiments, for example, the functions of the modules 410 to 430 shown in FIG. 4 are implemented.

Exemplarily, the computer program 52 can be divided into one or more modules/units, and the one or more modules/units are stored in the memory 51 and executed by the processor 50 to complete the this application. The one or more modules/units may be a series of computer program instruction segments capable of accomplishing specific functions, and the instruction segments are used to describe the execution process of the computer program 52 in the infrared touch screen multi-touch recognition device 5 . For example, the computer program 52 can be divided into a first generating unit, a first processing unit, and a first determining unit, and the specific functions of each unit are as follows:

The infrared touch screen multi-touch recognition device may include, but is not limited to, a processor 50 and a memory 51 . Those skilled in the art can understand that FIG. 5 is only an example of the multi-touch recognition device 5 on the infrared touch screen, and does not constitute a limitation on the multi-touch recognition device 5 on the infrared touch screen, and may include more or less components than those shown in the figure. Or some components are combined, or different components, for example, the infrared touch screen multi-touch recognition device may also include input and output devices, network access devices, buses, and the like.

The so-called processor 50 may be a central processing unit (Central Processing Unit, CPU), other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 51 may be an internal storage unit of the infrared touch screen multi-touch recognition device 5 , such as a hard disk or memory of the infrared touch screen multi-touch recognition device 5 . The memory 51 can also be an external storage device of the infrared touch screen multi-touch recognition device 5, such as a plug-in hard disk equipped on the infrared touch screen multi-touch recognition device 5, a smart memory card (Smart memory card). Media Card, SMC), Secure Digital (SD) card, Flash memory card (Flash Card), etc. Further, the infrared touch screen multi-touch recognition device 5 may also include both an internal storage unit of the infrared touch screen multi-touch recognition device 5 and an external storage device. The memory 51 is used to store the computer program and other programs and data required by the infrared touch screen multi-touch recognition device. The memory 51 can also be used to temporarily store data that has been output or will be output.

It should be noted that the information exchange, execution process and other contents between the above-mentioned devices/units are based on the same concept as the method embodiments of the present application. For specific functions and technical effects, please refer to the method embodiments section. It is not repeated here.

Those skilled in the art can clearly understand that, for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. Module completion, that is, dividing the internal structure of the device into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment may be integrated in one processing unit, or each unit may exist physically alone, or two or more units may be integrated in one unit, and the above-mentioned integrated units may adopt hardware. It can also be realized in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing from each other, and are not used to limit the protection scope of the present application. For the specific working processes of the units and modules in the above-mentioned system, reference may be made to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

An embodiment of the present application also provides a network device, the network device includes: at least one processor, a memory, and a computer program stored in the memory and executable on the at least one processor, the processor executing The computer program implements the steps in any of the foregoing method embodiments.

Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the steps in the foregoing method embodiments can be implemented.

The embodiments of the present application provide a computer program product, when the computer program product runs on a mobile terminal, the steps in the foregoing method embodiments can be implemented when the mobile terminal executes the computer program product.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the present application realizes all or part of the processes in the methods of the above embodiments, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium. When executed by a processor, the steps of each of the above method embodiments can be implemented. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file or some intermediate form, and the like. The computer-readable medium may include at least: any entity or device capable of carrying the computer program code to the photographing device/terminal device, a recording medium, a computer memory, a read-only memory (ROM, Read-Only). Memory), random access memory (RAM, Random Access Memory), electrical carrier signals, telecommunication signals, and software distribution media. For example, U disk, mobile hard disk, disk or CD, etc. In some jurisdictions, under legislation and patent practice, computer readable media may not be electrical carrier signals and telecommunications signals.

In the foregoing embodiments, the description of each embodiment has its own emphasis. For parts that are not described or described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In the embodiments provided in this application, it should be understood that the disclosed apparatus/network device and method may be implemented in other manners. For example, the apparatus/network device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units. Or components may be combined or may be integrated into another system, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

Claims

A multi-touch recognition method for an infrared touch screen, comprising:

Generate an infrared image according to the collected infrared information;

Traverse the pixel values of each point in the infrared image to obtain the peak area of the infrared image;

The target touch area is determined according to the peak area and the preset filtering rule.
The multi-touch recognition method for an infrared touch screen according to claim 1, wherein the traversing the pixel values of each point in the infrared image to obtain the peak area of the infrared image, comprising:

Traverse the pixel values of the pixel points of each row in the horizontal direction in the infrared image, obtain a first pixel value curve of the pixel values of the pixel points of each row, and obtain the first peak area according to the first pixel value curve;

Traverse the pixel values of the pixel points of each column in the vertical direction in the infrared image, obtain a second pixel value curve of the pixel values of the pixel points in each column, and obtain a second peak area according to the second pixel value curve;

Based on the first peak region and the second peak region, a peak region of the infrared image is determined.
The multi-touch recognition method for an infrared touch screen according to claim 2, wherein the step of traversing the pixel values of the pixels of each row in the horizontal direction in the infrared image is to obtain the first number of the pixel values of the pixels of each row. A pixel value curve, obtaining the first peak area according to the first pixel value curve, including:

Traverse the pixel values of the pixel points of each row in the horizontal direction in the infrared image to obtain a first pixel value curve of the pixel values of the pixel points of each row, and the peak points in the first pixel value curve;

According to the peak point of each first pixel value curve and the preset peak height, the first peak area corresponding to each first pixel value curve is determined.
The multi-touch recognition method for an infrared touch screen according to claim 2, wherein the traversal of the pixel values of the pixels in each column in the vertical direction in the infrared image is performed to obtain the pixel value of the pixels in each column. The second pixel value curve, the second peak area is obtained according to the second pixel value curve, including:

Traversing the pixel values of the pixel points of each column in the vertical direction in the infrared image to obtain a second pixel value curve of the pixel values of the pixel points in each column, and the peak points in the second pixel value curve;

According to the peak point of each second pixel value curve and the preset peak height, the second peak area corresponding to each second pixel value curve is determined.
The multi-touch recognition method for an infrared touch screen according to claim 1, wherein the generating an infrared image according to the collected infrared information comprises:

Obtain the signal value collected by each infrared receiving tube;

An infrared image is generated based on the signal values.
The multi-touch recognition method for an infrared touch screen according to claim 5, wherein the generating an infrared image according to the signal value comprises:

generating an initial image based on the signal values;

The pixel value of the pixel whose pixel value is less than the preset pixel threshold in the initial image is set to 0 to obtain an infrared image.
The multi-touch recognition method for an infrared touch screen according to claim 1, wherein the determining the target touch area according to the peak area and a preset screening rule includes:

Obtain the connected area of the pixel points corresponding to the peak area, and determine the suspected touch area according to the connected area;

Obtaining feature information of the suspected touch area, and determining authenticity evaluation information of the suspected touch area based on the feature information;

Screening out a target touch area from the suspected touch area according to the authenticity evaluation information;

Determine the location information of the target touch area.
An infrared touch screen multi-touch identification device, characterized in that it includes:

a first generating unit, configured to generate an infrared image according to the collected infrared information;

a first processing unit, configured to traverse the pixel values of each point in the infrared image to obtain the peak area of the infrared image;

The first determining unit is configured to determine the target touch area according to the peak area and the preset screening rule.
An infrared touch screen multi-touch recognition device, comprising a memory, a processor, and a computer program stored in the memory and running on the processor, characterized in that the processor implements the computer program when executing the computer program A method as claimed in any one of claims 1 to 7.
A computer-readable storage medium storing a computer program, characterized in that, when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.